Faculty of Engineering Technology Mechanical and Automotive, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia.
School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup WA 6027, Australia.
Molecules. 2020 Jun 28;25(13):2975. doi: 10.3390/molecules25132975.
Friction and wear are the main factors in the failure of the piston in automobile engines. The objective of this work was to improve the tribological behaviour and lubricant properties using hybrid Cellulose Nanocrystal (CNC) and Copper (II) oxide nanoparticles blended with SAE 40 as a base fluid. The two-step method was used in the hybrid nanofluid preparation. Three different concentrations were prepared in a range of 0.1% to 0.5%. Kinematic viscosity and viscosity index were also identified. The friction and wear behavior were evaluated using a tribometer based on ASTM G181. The CNC-CuO nano lubricant shows a significant improvement in term of viscosity index by 44.3-47.12% while for friction, the coefficient of friction (COF) decreases by 1.5%, respectively, during high and low-speed loads (boundary regime), and 30.95% during a high-speed, and low load (mixed regime). The wear morphologies results also show that a smoother surface was obtained after using CNC-CuO nano lubricant compared to SAE 40.
摩擦和磨损是汽车发动机活塞失效的主要因素。本工作的目的是通过使用混合纤维素纳米晶体 (CNC) 和氧化铜 (II) 纳米粒子与 SAE 40 作为基础液来改善其摩擦学性能和润滑性能。混合纳米流体的制备采用两步法。在 0.1%到 0.5%的范围内制备了三种不同的浓度。还确定了运动粘度和粘度指数。使用基于 ASTM G181 的摩擦磨损试验机评估了摩擦磨损行为。与 SAE 40 相比，CNC-CuO 纳米润滑剂在粘度指数方面有显著提高，提高了 44.3-47.12%，而在高、低负荷（边界区）时，摩擦系数（COF）降低了 1.5%，在高速、低负荷（混合区）时降低了 30.95%。磨损形貌结果也表明，与 SAE 40 相比，使用 CNC-CuO 纳米润滑剂后表面更加光滑。
